Genetic Variant BTBD8:p.Ala74Val (chr1-92088769-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001376131.1(BTBD8):c.221C>T(p.Ala74Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000663 in 1,612,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000068 ( 0 hom. )

Consequence

BTBD8
NM_001376131.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.23

Publications

0 publications found

Variant links:

Genes affected

BTBD8 (HGNC:21019): (BTB domain containing 8) Predicted to be involved in clathrin-dependent synaptic vesicle endocytosis; neuron projection development; and synaptic vesicle budding from endosome. Located in nucleoplasm. Colocalizes with AP-2 adaptor complex. [provided by Alliance of Genome Resources, Apr 2022]

BTBD8 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.1920596).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001376131.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BTBD8	NM_001376131.1	MANE Select	c.221C>T	p.Ala74Val	missense	Exon 2 of 18	NP_001363060.1	Q5XKL5-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BTBD8	ENST00000636805.2	TSL:5 MANE Select	c.221C>T	p.Ala74Val	missense	Exon 2 of 18	ENSP00000490161.1	Q5XKL5-3
BTBD8	ENST00000342818.4	TSL:1	c.221C>T	p.Ala74Val	missense	Exon 2 of 9	ENSP00000343686.3	A0A8V8N7F1
BTBD8	ENST00000370382.7	TSL:1	n.488C>T		non_coding_transcript_exon	Exon 2 of 6

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152068

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000995

AC:

AN:

251310

AF XY:

0.000118

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000167

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000678

AC:

AN:

1460824

Hom.:

Cov.:

AF XY:

0.0000743

AC XY:

AN XY:

726712

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33460

American (AMR)

AF:

0.0000671

AC:

AN:

44686

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26098

East Asian (EAS)

AF:

0.00

AC:

AN:

39556

South Asian (SAS)

AF:

0.0000928

AC:

AN:

86166

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53364

Middle Eastern (MID)

AF:

0.000521

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

0.0000684

AC:

AN:

1111390

Other (OTH)

AF:

0.0000994

AC:

AN:

60344

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.449

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152068

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74278

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41412

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.000207

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

67990

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000165

Hom.:

Bravo

AF:

0.0000756

ExAC

AF:

0.0000988

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.28

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.14

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.061

FATHMM_MKL

Benign

0.62

LIST_S2

Benign

0.72

M_CAP

Benign

0.011

MetaRNN

Benign

0.19

MetaSVM

Benign

-0.97

MutationAssessor

Benign

1.5

PhyloP100

2.2

PrimateAI

Benign

0.38

PROVEAN

Benign

-1.9

REVEL

Benign

0.19

Sift

Benign

0.043

Sift4G

Benign

0.090

Polyphen

0.035

Vest4

0.32

MVP

0.75

MPC

0.44

ClinPred

0.047

GERP RS

4.4

Varity_R

0.25

Mutation Taster

=89/11

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over